Using coherent population trapping in test atoms for magnetic field measurements in toroidal plasmas

Journal Article · Sat Sep 15 00:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2771521· OSTI ID:21069852

Akhmedzhanov, R A; Gushchin, L A; Zelensky, I V; Litvak, A G; Tokman, M D ^[1]

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1. Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod (Russian Federation)

A way to measure the profile of the safety factor in toroidal controlled-fusion setups has been developed. The method is based on measuring the ratio of the poloidal magnetic field and the toroidal one locally, based on a modification of the optical resonance-fluorescence signal. The effect of partial suppression of resonance fluorescence is used, which depends on the orientation of the magnetic field relative to the laser beam, and takes place in case of coherent population trapping in test atoms with the Zeeman split-level structure, as affected by double-frequency laser radiation.

• OSTI ID: 21069852
• Journal Information: Physics of Plasmas, Vol. 14, Issue 9; Other Information: DOI: 10.1063/1.2771521; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ATOMS
LASER RADIATION
LASERS
MAGNETIC FIELDS
MODIFICATIONS
ORIENTATION
PLASMA
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
RESONANCE FLUORESCENCE
TOROIDAL CONFIGURATION
TRAPPING
ZEEMAN EFFECT